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M. F. WlLLIAMS. GRINDER FOR WET SUGAR, 64c.

APPLICATION FILED MAR. 24.1919.

Patented Oct. 21, 1919.

amuem-lio c Clue mung STATES PATENT OFFICE.

MILTON F. WILLIAMS, OF ST. LOUIS, MISSOURI, ASSIGNOR TO WILLIAMS PATENT CRUSHER & PULVERIZER 00., OF ST, LOUIS, MISSOURI, A CORPORATION OF MIS- SOURI.

Specification of Letters Patent.

Patented Oct. 21, 1919.

Application filed March 24, 1919. Serial No. 284,576.

To all whom it may concern:

Be it known that I, MILTON F. lVILLIAMs, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Grinders for Wet Sugar, &c., of which the following is a specification.

This invention relates to certain new and useful improvements in grinders for wet sugar and like sticky material having a tendency to pack and arch over in the feed hopper and cage where it is being reduced. The peculiarities of this grinder will be hereinafter fully described and claimed.

The object of my invention is the provision of means for producing a positive feed to a grinding mill reducing a material, such as brown sugar or moist sugar, that has a tendency to pack and arch and obstruct the feeding action in the process of reduction. To this end my invention has reference to a vertical feed screw, radially mounted, and of maximum diameter compared to the rotor and inclosing cage, together with a hopper and suitable driving mechanism for the feed screw, whereby the material being fed to the hopper is unable to find any obstructing surfaces, corners or recesses to which the said material may adhere, arch over or otherwise be retarded in its passage to the rotor of the grinder.

In the accompanying drawing on which like reference letters indicate corresponding parts, Figure 1 represents a front view and partial sectional elevation of a grinder embodying my invention; Fig. 2, a side view of the same having a part broken away to show the interior construction; and Fig. 3, a horizontal plan view on a section taken on the line 22 of Fig. 2.

The letter A designates the shaft of a rotor suitably mounted in a housing B, and carrying hammers C by hammer rods and disks, by which said hammers are pivotally mounted on said shaft and constitute the rotor.

A cage D entirely incloses this rotor between the side housing of the grinder, being extended from the central plane of the shaft by continuing the cylindrical cage and con stitute a complete cylinder, except at the top where a casing E intersects with the cage and forms an inlet opening that is practically the width of the cage and rotor in diameter as shown in Fig. 2. This casing E is 011 a vertical radial line through the shaft A, and in the casing is mounted a feed screw F, completely filling said casing so that it may find a bearing in the casing to steady the lower end of the shaft G on which the screw is mounted, while the upper end of said shaft is mounted in a vertical bearing H in a cross bar I connecting side standards J J, or other upward extensions from a hopper K that flares upward and outward from its connection with the screw casing E. On the upper ends of said standards are bearings L L, in which is mounted a cross shaft M carrying a bevel pinion N that intermeshes with a bevel gear 0 upon the upper end of the feed shaft G above said bearing H. The cross shaft M is driven by a pulley P on the end of the shaft, preferably belted to a smaller pulley Q on said shaft A opposite the driving pulley R of the grinder, by which means the vertical feed shaft is driven at a much reduced feed compared to the speed of the shaft A. Other means for driving the cross shaft may be provided. As shown in the drawing, the standards J J are located the same distance apart as the side edges of the housing B of said grinder, and form part of the conical hopper K, so that an attachment is provided for said grinder which rests upon the sides or upper edges of the grinder housing, and is secured thereto by means of bolts passing through matching holes in lugs S at the back of the grinder, and through horizontal web plate T having matching holes with a top portion of the grinder as shown in Fig. 1. It is thus easy to adapt a grinder used for feed and like material, so that it may be used for grinding sticky material such as wet sugar, and constitute a self contained grinder of other material than that for which the mill was originally intended to reduce.

It will be seen from the plan view Fig. 3 and vertical section Fig. 2 and the portion of Fig. 1 that is broken away, that the vertical radial screw F ends directly adjacent to the hammer circle of the pivoted rotary hammers C. In Fig. 2, the upper hammer is broken away in order to show the intersection of the casing E and the cage D. The feed screw extends upward into the conical hopper and large lumps of sugar, for instance, will be crushed by the upper end of the screw and carried-down through the castaken by a thrust bearing U of ball bearing or other construction, mounted on said shaft between the cross bar I carrying the bearing H and a set collar V on sa1d shaft G. A

wearing washer W is also provided above the bearing H, for the hub of the bevel O on'the end of-said shaft.

I claim:

1. A grinder comprising a rotor having rotary pivoted hammers, a cage inclosing said rotor, a vertical feed screw and shaft radially mounted above said rotor and endsignature.

ing directly adjacent to the ath of said hammers, a cylindrical casing for said screw intersecting said cage at the top and having a conical flaring hopper and means to drive said shaft.

2. A machine of the character described comprising a casing, a horizontal shaft, and rotor on said shaft, a cylindrical cage having a circular top feed inlet opening of a diameter substantially the length of the cage, a cylindrical feed hopper registering said cage inlet opening, a forced feed device located in the said hopper, and speed reducing mechanism operatively'connecting said feed device with said rotor shaft, substantially as described and for the purpose set forth.

In testimony whereof I have afiiXed my MILTON F. WILLIAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

